Watch casing



FIG. 1 is a front plan view of a watch casing showing my new design;

FIG. 2 is a rear plan view of the embodiment of FIG. 1;

FIG. 3 is a left side elevational view of the embodiment of FIG. 1;

FIG. 4 is a right side elevational view of the embodiment of FIG. 1;

FIG. 5 is a top plan view of the embodiment of FIG. 2; and,

FIG. 6 is a bottom plan view of the embodiment of FIG. 1. 

The ornamental design for a watch casing, as shown and described. 